Using the socket to transmit files

Welcome criticism

You can also look at the more detailed here http://www.jb51.net/article/53733.htm

Service Side
#include <stdio.h>#include<string.h>#include<stdlib.h>#include<sys/socket.h>#include<arpa/inet.h>#include<unistd.h>#defineBuffer_size 1024#defineFile_name_size 512voidErrorChar*message);intMainintargcChar*argv[]) {    intserv_sock,clnt_sock,i,length,read_length,j; structsockaddr_in serv_addr,clnt_addr;    Socklen_t CLNT_ADDR_SZ; CharFile_name[file_name_size],message[buffer_size]; CharBuffer[buffer_size]; if(argc!=2) {printf ("usage:%s<port>\n", argv[0]); Exit (1); } Serv_sock=socket (Pf_inet,sock_stream,0); if(serv_sock==-1) Error ("socket () error"); memset (&AMP;SERV_ADDR,0,sizeof(SERV_ADDR)); Serv_addr.sin_family=af_inet; Serv_addr.sin_addr.s_addr=htonl (Inaddr_any); Serv_addr.sin_port=htons (Atoi (argv[1])); if(Bind (Serv_sock, (structsockaddr*) &serv_addr,sizeof(SERV_ADDR)) ==-1) Error ("bind () error"); if(Listen (Serv_sock,3)==-1) Error ("Listen () Error"); CLNT_ADDR_SZ=sizeof(CLNT_ADDR);  for(i=1; i<=3; i++)    //While (1){Clnt_sock=accept (Serv_sock, (structsockaddr*) &clnt_addr,&CLNT_ADDR_SZ); if(clnt_sock==-1) Error ("Accept () error"); Elseprintf ("connected client%d \ n '", i); if(Read (clnt_sock,buffer,buffer_size) ==-1) printf ("read () Error");            strcpy (File_name,buffer); printf ("file ' s name%s\n", file_name); FILE*fp=fopen (file_name,"R"); if(fp==NULL) printf ("file%s can not open \ n", file_name); Else{bzero (buffer,buffer_size);  while(Length=fread (Buffer,sizeof(Char), BUFFER_SIZE,FP) >0)            {                if(Write (Clnt_sock,buffer,length) ==-1) {printf ("Send file%s failed\n", file_name);  Break;            }} fclose (FP); printf ("Transfer succeed\n");    } close (Clnt_sock);    } close (Serv_sock); return 0;}voidErrorChar*message)    {fputs (Message,stderr); FPUTC ('\ n', stderr); Exit (1);}

Client
1#include <stdio.h>2#include <stdlib.h>3#include <string.h>4#include <unistd.h>5#include <arpa/inet.h>6#include <sys/socket.h>7 #defineFILE_NAME_SZ 5128 #defineBuffer_size 10249 voidErrorChar*message);Ten  One intMainintargcChar*argv[]) A { -     intsock,temp=0; -     structsockaddr_in clnt; the     intlength,write_length; -     CharBuffer[buffer_size+1]; -     Charfilename[file_name_sz+1]; -     CharMessage[buffer_size]; +Sock=socket (Pf_inet,sock_stream,0); -     if(argc!=3) +     { Aprintf"usage:%s<ip><port>\n", argv[0]); at     } -     if(sock==-1) -Error"socket () error"); -  -memset (&AMP;CLNT,0,sizeof(CLNT)); -clnt.sin_family=af_inet; inCLNT.SIN_ADDR.S_ADDR=INET_ADDR (argv[1]); -Clnt.sin_port=htons (Atoi (argv[2])); to  +     if(Connect (sock,structsockaddr*) &AMP;CLNT,sizeof(CLNT)) ==-1) -Error"Connect () Error"); the     Else *Puts"connect ... .."); $ Panax Notoginsengprintf"input File Name\t"); -scanf"%s", filename); the  + strcpy (buffer,filename); A write (sock,buffer,buffer_size); the      +FILE *fp=fopen (filename,"W"); -     if(fp==NULL) $     { $printf"Open File%s error\n", filename); -Exit1); -     } the     Else -     {Wuyi bzero (buffer,buffer_size); the          while((Length=read (sock,buffer,buffer_size)) >0) -         { Wu             if(Fwrite (Buffer,sizeof(Char), LENGTH,FP) <length) -             { Aboutprintf"file%s Write error\n", filename); $                      Break; -             } -             //printf ("Receive%s succeed\n", filename); -temp=1; A         } +         if(temp==1) printf ("Receive%s succedd\n", filename); the         Elseprintf"Receive%s failed\n", filename); -     } $ fclose (FP); the Close (sock); the     return 0; the } the  - voidErrorChar*message) in { the fputs (message,stderr); theFPUTC ('\ n', stderr); AboutExit1); the}

Using the socket to transmit files